Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Cell and Molec
Chapter 17
| Term | Definition |
|---|---|
| intermediate filament | fibrous protein filament (10 nm long) that forms ropelike networks in animal cells. Often used as a structural element that resists tension applied to the cell from outside. |
| microtubule | long stiff, cylindrical structure composed of the protein tubulin. Used by eucaryotic cells to regulate their shape and control their movements |
| actin filament | protein filament, about 7 nm wide, formed from a chain of globular actin molecules. A major constituent of the cytoskelteon of all eucaryotic cells and especially abundant in muscle cells |
| nuclear lamina | fibrous layer on the inner surface of the inner nuclear membrane formed as a network of intermediate filaments made from nuclear lamina |
| centrosome | centrally located organelle of animal cells that is the primary mictrotubule-organizing center and separates to form the two spindle poles during mitosis. In most animal cells it contains a pair of centrioles |
| centriole | short cylindrical array of microtubules, usually found in pairrs at the center of a centrosome in animal cells. Also found at the base of cilia and flagella, called basal bodies |
| tubulin | protein from which microtubules are made |
| dynamic instability | the property shown by microtubules of growing and shrinking repeatedly through the addition and loss of tubulin subunits from their exposed ends |
| kinesin | a large family of motor proteins that use the energy of ATP hydrolysis to move along a microtubule |
| dynein | member of a family of large motor proteins that undergo ATP-dependent movement along microtubules.responsible for the bending of cilia. |
| cilium-cilia | hairlike extension on the surface of a cell with a core bundle of mictrotubules and capable of performing repeated beating movements. Cilia in large numbers drive the movement of fluid over epithelial sheets, like lungs. |
| flagellum-flafella | long whiplike protrusion that drives a c ell through a fluid medium by its beating. Eucaryotic flagella are longer versions of cillia, bacteria flagella are different and smaller |
| motor protein | protein such as myosin or kinesithat uses energy derived from ATP hydrolysis to propel itself along a protein filament or polymeric molecule |
| lamellpodium | dynamic sheetlike extension on the surface of an animal cell, especially one migrating over a surface |
| filopodium | long thin actin-containing extension on the surface of an animal cell. sometimes has an exploratory function, as in a growth cone. |
| Rho protein | famiof small GTPases involved in signaling that causes a rearrangement of the actin cytoskeleton |
| myosin | type of motor protein that uses ATP to drive movements along actin filaments. Myosin II is a large protein that forms the thick filaments of skeletal muscle. Smaller myosins,Myosin I,are widely distributed and are responsible for many actin-based movement |
| sarcomere | repeating unit of a myofibril in a muscle cell, about 2.5 uL long, composed of an arrat of ovverlapping thick myosin and thin actin filaments |
Created by:
1788677196
Popular Biology sets